The moves came as petitions circulated online targeting companies offering discounts to NRA members on its website. #BoycottNRA was trending on Twitter.

The latest is TrueCar. It's joining other car companies like Enterprise, Hertz and Avis, which are ending discount programs with the NRA.

MetLife is also ending discounts on home and auto policies for NRA members.

And the First National Bank of Omaha said it will no longer issue NRA-branded Visa credit-cards. It said the decision was made due to customer feedback.

Other companies include Delta Airlines, the software company Symantec, insurer Chubb Limited, Wyndham Hotels and Best Western hotels.

Delta is reaching out to the NRA to let them know we will be ending their contract for discounted rates through our group travel program. We will be requesting that the NRA remove our information from their website.